Galaxaura Lamouroux

de Clerck, Olivier, Coppejans, Eric, Schils, Tom, Verbruggen, Heroen, Leliaert, Frederik, de Vriese, Thomas & Marie, Daniel, 2004, The marine red algae of Rodrigues (Mauritius, Indian Ocean), Journal of Natural History 38 (23), pp. 3021-3057 : 3024

Galaxaura Lamouroux

Key to the species from Rodrigues

1 Thalli complanate; devoid of hair-like assimilating filaments.. Galaxaura marginata

– Thalli terete; surface with (tetrasporophyte) or without (gametophyte) hair-like assimilating filaments............. Galaxaura rugosa

* Galaxaura marginata (Ellis and Solander) Lamouroux, 1816: 264 References: Jaasund, 1976: 69, figure 138 (as G. tenera Kjellman ), figure 139 (as G. elegans Tanaka ); Papenfuss et al., 1982: 411–415, figures 7 –9, 24, 36, 37; Tseng, 1984: 62, pl. 34, figure 2 (as G. veprecula Kjellman ); Moorjani and Simpson, 1988: 28, pl. 57 (as G. tenera ); Huisman and Borowitzka, 1990: 157–161, figures 14–27; Millar, 1990: 304–305, figure 6A–G ; Cribb, 1996: 81, figure p. 80; Abbott, 1999: 67, figure 7G–H ; Huisman, 2000: 38; Littler and Littler, 2000: 58, figure p. 59; Payri et al., 2000: 164, figures pp. 163, 165; Littler and Littler, 2003: 64, middle figure p. 65.

Type locality. Bahamas .

Vouchers. HEC 14696, 20 September 2001, Rivière Banane (s.s. 12) ; HEC 14806, 26 September 2001, Chaland (s.s. 8) ; HEC 14877, 1 October 2001, Totor (s.s. 9) .

Ecology. One collection in a rock pool at low tide level, the others from the subtidal at 8 and 10 m depth.

Indian Ocean distribution. Amirante Islands, Andaman Islands, south-east coast of Arabia, Comores, Djibouti, India, Indonesia, Yemen, Kenya, Laccadives, Madagascar, Maldives, Mauritius ( Børgesen, 1942: 52–54, figures 24, 25), Mozambique, Nicobar Islands, Oman, Réunion ( Payri, 1985: 640), Rodrigues (this paper), Seychelles, Somalia, South Africa, Sri Lanka, Tanzania.

* Galaxaura rugosa (Ellis and Solander) Lamouroux, 1816: 263 References: Magruder and Hunt, 1979: 69, figure 1 p . 68; Papenfuss et al., 1982: 421–424, figures 17–19, 29, 40, 41, 45; Huisman and Borowitzka, 1990: 153–157, figures 1 –13; Verheij and Prud’homme van Reine, 1993: 440, pl. 14:3; Abbott, 1999: 68, figure 8A–E; Huisman, 2000: 39; Payri et al., 2000: 166, figure p. 167; Littler and Littler, 2003: 66, top and middle figures p. 67.

Type locality. Jamaica .

Vouchers. HEC 14608 and HEC 14610 (zF), 18 September 2001, western side of Cotton Bay (s.s. 13) ; HEC 14837, 27 September 2001, Baie de l’Hermitage (s.s. 18) .

Ecology. Extremely abundant in back reef pools just under spring low water mark.

Indian Ocean distribution. Aldabra Islands, Andaman Islands, Australia, Comores, Djibouti, India, Indonesia, Iran, Kenya, Laccadives, Madagascar, Maldives, Mauritius ( Børgesen, 1942: 48, 1951: 35–36, figure 17, as G. mauritiana Børgesen ), Mozambique, Nicobar Islands, Réunion ( Montagne and Millardet, 1862: 10–11, also as Microthoe marginata Lamouroux ; Jadin, 1935: 163, also as G. lapidescens (Ellis and Solander) Lamouroux ; Payri, 1985: 640, also as G. mauritiana Børgesen ), Rodrigues (this paper), Seychelles, Singapore, Somalia, Sri Lanka, Tanzania.

Figures

FIGS 1–7. Rhodophytes. (1) Gracilaria corticata (HEC 14627). (2) Renouxia antillana (HEC 14804). (3) Platoma cyclocolpa (HEC 14805). (4) Titanophora pikeana (HEC 14875). (5, 6) Cryptonemia crenulata (HEC 14876): (5) general morphology; (6) serrate margin. (7) Cryptonemia crenulata (HEC 15134b): cross-section showing cortex and medulla with densely stained ganglionic cells. Scale bars: 1 cm (1, 3, 4); 2 cm (2, 5); 5 mm (6); 50 Mm (7).